Summary

Add discovery and single-work-item creation prompts, add autonomy hooks to
existing instruction files, and wire 5 existing ADO prompts through the
ADO Backlog Manager agent.

Part of #774. Depends on shared infrastructure (#776).

Changes

New Files

• .github/prompts/ado/ado-discover-work-items.prompt.md
  • 3 discovery paths (user-centric, artifact-driven, search-based)
  • contentFormat input for format annotations in planning files
  • Routes through agent: ADO Backlog Manager
• .github/prompts/ado/ado-add-work-item.prompt.md
  • 5-step conversational workflow for single work item creation
  • contentFormat input with format-aware template selection (Steps 3, 5)
  • Uses interaction templates

Modified Files

• .github/instructions/ado/ado-wit-discovery.instructions.md (autonomy hook paragraph)
• .github/instructions/ado/ado-update-wit-items.instructions.md (autonomy hook + Dry Run Mode)
• .github/prompts/ado/ado-process-my-work-items-for-task-planning.prompt.md (agent: ADO Backlog Manager)
• .github/prompts/ado/ado-update-wit-items.prompt.md (agent: ADO Backlog Manager + contentFormat input)
• .github/prompts/ado/ado-get-build-info.prompt.md (agent: ADO Backlog Manager)
• .github/prompts/ado/ado-create-pull-request.prompt.md (agent: ADO Backlog Manager)
• .github/prompts/ado/ado-get-my-work-items.prompt.md (agent: ADO Backlog Manager + contentFormat input)
• collections/ado.collection.yml (discovery + add-work-item entries)

Acceptance Criteria

• ado-discover-work-items.prompt.md created with 3 discovery paths and contentFormat input
• ado-add-work-item.prompt.md created with 5-step workflow and contentFormat input
• Autonomy hook added to ado-wit-discovery.instructions.md
• Autonomy hook + Dry Run Mode added to ado-update-wit-items.instructions.md
• 5 existing prompts updated with agent: ADO Backlog Manager frontmatter
• contentFormat input added to ado-update-wit-items.prompt.md and ado-get-my-work-items.prompt.md
• Collection manifest updated
• Markdown linting passes